ChromiumOS系統(tǒng)進(jìn)程

進(jìn)程樹(shù)

ChromiumOS系統(tǒng)登錄后的進(jìn)程樹(shù)如下所示：

$ pstree -nulp
init(1)-+-udevd(119)
        |-frecon(287)---frecon(338)
        |-rsyslogd(380,syslog)-+-{rsyslogd}(403)
        |                      |-{rsyslogd}(404)
        |                      |-{rsyslogd}(405)
        |                      `-{rsyslogd}(408)
        |-dbus-daemon(389,messagebus)
        |-wpa_supplicant(469,wpa)
        |-session_manager(584)---chrome(696,chronos)-+-{chrome}(866)
        |                                            |-chrome(869)-+-nacl_helper(896)
        |                                            |             |-nacl_helper_non(910)
        |                                            |             `-chrome(917)-+-chrome(2231)-+-{chrome}(2234)
        |                                            |                           |              |-{chrome}(2235)
        |                                            |                           |              |-{chrome}(2251)
        |                                            |                           |              |-{chrome}(2254)
        |                                            |                           |              |-{chrome}(2257)
        |                                            |                           |              |-{chrome}(2261)
        |                                            |                           |              |-{chrome}(2262)
        |                                            |                           |              |-{chrome}(2274)
        |                                            |                           |              `-{chrome}(2275)
        |                                            |                           `-chrome(2437)-+-{chrome}(2440)
        |                                            |                                          |-{chrome}(2441)
        |                                            |                                          |-{chrome}(2442)
        |                                            |                                          |-{chrome}(2443)
        |                                            |                                          |-{chrome}(2444)
        |                                            |                                          |-{chrome}(2445)
        |                                            |                                          |-{chrome}(2446)
        |                                            |                                          `-{chrome}(2447)
        |                                            |-{chrome}(918)
        |                                            |-{chrome}(919)
        |                                            |-{chrome}(994)
        |                                            |-{chrome}(996)
        |                                            |-{chrome}(997)
        |                                            |-{chrome}(998)
        |                                            |-{chrome}(999)
        |                                            |-{chrome}(1000)
        |                                            |-{chrome}(1001)
        |                                            |-{chrome}(1004)
        |                                            |-{chrome}(1005)
        |                                            |-{chrome}(1006)
        |                                            |-{chrome}(1007)
        |                                            |-{chrome}(1008)
        |                                            |-{chrome}(1009)
        |                                            |-{chrome}(1010)
        |                                            |-{chrome}(1011)
        |                                            |-{chrome}(1012)
        |                                            |-{chrome}(1014)
        |                                            |-chrome(1015)-+-chrome(1022)
        |                                            |              |-{chrome}(1023)
        |                                            |              |-{chrome}(1024)
        |                                            |              |-{chrome}(1025)
        |                                            |              `-{chrome}(1026)
        |                                            |-{chrome}(1017)
        |                                            |-{chrome}(1019)
        |                                            |-{chrome}(1020)
        |                                            |-{chrome}(1027)
        |                                            |-{chrome}(1028)
        |                                            |-{chrome}(1033)
        |                                            |-{chrome}(2134)
        |                                            |-{chrome}(2209)
        |                                            |-{chrome}(2224)
        |                                            |-{chrome}(2228)
        |                                            `-{chrome}(2663)
        |-debugd(667)
        |-powerd(710,power)---{powerd}(728)
        |-tcsd(853,tss)-+-{tcsd}(864)
        |               `-{tcsd}(989)
        |-chapsd(857,chaps)
        |-firewalld(879)
        |-permission_brok(882,devbroker)
        |-shill(909)-+-logger(920,syslog)
        |            `-dhcpcd(2650,dhcp)
        |-cryptohomed(987)---{cryptohomed}(1452)
        |-periodic_schedu(1098)---sleep(3765)
        |-periodic_schedu(1110)---sleep(3769)
        |-minijail0(1116)---mtpd(1124,mtp)---{mtpd}(1171)
        |-periodic_schedu(1127)---sleep(3774)
        |-esif_ufd(1150)-+-{esif_ufd}(1169)
        |                |-{esif_ufd}(1180)
        |                |-{esif_ufd}(1214)
        |                |-{esif_ufd}(1314)
        |                `-{esif_ufd}(1315)
        |-ModemManager(1157,modem)-+-{ModemManager}(1210)
        |                          `-{ModemManager}(1240)
        |-minijail0(1170)---cras(1192,cras)---{cras}(1213)
        |-metrics_daemon(1181)
        |-minijail0(1185)---bluetoothd(1204,bluetooth)
        |-avahi-daemon(1196,avahi)---avahi-daemon(1205)
        |-update_engine(1199)
        |-sshd(1207)-+-sshd(3167)---bash(3171)---pstree(4458)
        |            `-sshd(4232)---bash(4238)
        |-minijail0(1216)---conntrackd(1241,nfqueue)
        |-disks(1244)---{disks}(1256)
        |-upstart-socket-(1292)
        |-warn_collector(1769)
        |-sh(1805)-+-tlsdated(1866,tlsdate)---tlsdated-setter(1877,root)
        |          `-logger(1867)
        `-periodic_schedu(1871)---sleep(3782)
  • 大括號(hào)中的為線程。

可以看到chrome(696,chronos)進(jìn)程是由session_manager(584)進(jìn)程啟動(dòng)的，并且session_manager(584)是由root用戶執(zhí)行的，而chrome(696,chronos)是由用戶chronos用戶執(zhí)行。

chrome進(jìn)程命令

接下來(lái)再看進(jìn)程chrome(696,chronos)的相關(guān)信息:

$ pstree -nulps 696
init(1)---session_manager(584)---chrome(696,chronos)-+-{chrome}(866)
                                                     |-chrome(869)-+-nacl_helper(896)
                                                     |             |-nacl_helper_non(910)
                                                     |             `-chrome(917)-+-chrome(2231)-+-{chrome}(2234)
                                                     |                           |              |-{chrome}(2235)
                                                     |                           |              |-{chrome}(2251)
                                                     |                           |              |-{chrome}(2254)
                                                     |                           |              |-{chrome}(2257)
                                                     |                           |              |-{chrome}(2261)
                                                     |                           |              |-{chrome}(2262)
                                                     |                           |              `-{chrome}(2275)
                                                     |                           `-chrome(2437)-+-{chrome}(2440)
                                                     |                                          |-{chrome}(2441)
                                                     |                                          |-{chrome}(2442)
                                                     |                                          |-{chrome}(2443)
                                                     |                                          |-{chrome}(2444)
                                                     |                                          |-{chrome}(2445)
                                                     |                                          `-{chrome}(2446)
                                                     |-{chrome}(918)
                                                     |-{chrome}(919)
                                                     |-{chrome}(994)
                                                     |-{chrome}(998)
                                                     |-{chrome}(999)
                                                     |-{chrome}(1000)
                                                     |-{chrome}(1001)
                                                     |-{chrome}(1004)
                                                     |-{chrome}(1005)
                                                     |-{chrome}(1006)
                                                     |-{chrome}(1007)
                                                     |-{chrome}(1008)
                                                     |-{chrome}(1009)
                                                     |-{chrome}(1010)
                                                     |-{chrome}(1011)
                                                     |-{chrome}(1012)
                                                     |-{chrome}(1014)
                                                     |-chrome(1015)-+-chrome(1022)
                                                     |              |-{chrome}(1023)
                                                     |              |-{chrome}(1024)
                                                     |              |-{chrome}(1025)
                                                     |              `-{chrome}(1026)
                                                     |-{chrome}(1017)
                                                     |-{chrome}(1019)
                                                     |-{chrome}(1020)
                                                     |-{chrome}(1027)
                                                     |-{chrome}(1033)
                                                     |-{chrome}(2209)
                                                     |-{chrome}(2224)
                                                     |-{chrome}(2228)
                                                     |-{chrome}(10988)
                                                     `-{chrome}(10990)

因?yàn)?code>pstree默認(rèn)會(huì)顯示線程信息，因此在上邊的輸出中看到其中有很多的線程(大括號(hào)中)；因?yàn)閜s命令默認(rèn)不顯示線程信息，因此這里再使用ps命令來(lái)進(jìn)行查看：

$ ps cf -g696
  PID TTY      STAT   TIME COMMAND
  696 ?        S<sl   3:37 chrome
  869 ?        S      0:00  \_ chrome
  896 ?        S      0:00  |   \_ nacl_helper
  910 ?        S      0:00  |   \_ nacl_helper_non
  917 ?        S      0:00  |   \_ chrome
 2231 ?        Sl     0:00  |       \_ chrome
 2437 ?        Sl     0:00  |       \_ chrome
 1015 ?        S<l    1:00  \_ chrome
 1022 ?        S<     0:00      \_ chrome

對(duì)應(yīng)的具體的命令行依次為：

進(jìn)程命令詳細(xì)信息

  1. 696: 
    /opt/google/chrome/chrome
--ui-prioritize-in-gpu-process
--use-gl=egl
--gpu-sandbox-failures-fatal=yes
--enable-logging
--log-level=1
--use-cras
--enable-wayland-server
--user-data-dir=/home/chronos
--max-unused-resource-memory-usage-percentage=5
--system-developer-mode
--login-profile=user
--has-chromeos-keyboard
--enable-prefixed-encrypted-media
--enable-consumer-kiosk
--enterprise-enrollment-initial-modulus=15
--enterprise-enrollment-modulus-limit=19
--login-manager
--first-exec-after-boot
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
  2. 869: 
    /opt/google/chrome/chrome
--type=zygote
--enable-logging
--log-level=1
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--user-data-dir=/home/chronos
--homedir=/
  3. 896: 
    /opt/google/chrome/nacl_helper
  4. 910: 
    /opt/google/chrome/nacl_helper_nonsfi
  5. 917: 
    /opt/google/chrome/chrome
--type=zygote
--enable-logging
--log-level=1
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--user-data-dir=/home/chronos
--homedir=/
  6. 2231: 
    /opt/google/chrome/chrome
--type=renderer
--enable-logging
--log-level=1
--use-gl=egl
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--field-trial-handle=1
--primordial-pipe-token=5E1FBBEDA76DCEC2B1D9D5B6593DC07D
--lang=en-US
--user-data-dir=/home/chronos
--homedir=/home/chronos/u-b11a95cbe6469c62fde2b9b136bf1f2e7aaf19bf
--login-profile=user
--instant-process
--enable-offline-auto-reload
--enable-offline-auto-reload-visible-only
--blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=true,cssExternalScannerNoPreload=false,cssExternalScannerPreload=true
--enable-pinch
--num-raster-threads=1
--content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,36197;0,8,3553;0,9,36197;0,10,36197;0,11,36197;0,12,36197;0,13,3553;0,14,36197;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,36197;1,10,3553;1,11,36197;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,36197;2,10,36197;2,11,36197;2,12,36197;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,35
  7. 2437: 
    /opt/google/chrome/chrome
--type=renderer
--enable-logging
--log-level=1
--use-gl=egl
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--field-trial-handle=1
--primordial-pipe-token=5A35EBC7CF23C09818C15F2449F6DAE7
--lang=en-US
--user-data-dir=/home/chronos
--homedir=/home/chronos/u-b11a95cbe6469c62fde2b9b136bf1f2e7aaf19bf
--login-profile=user
--enable-offline-auto-reload
--enable-offline-auto-reload-visible-only
--blink-settings=disallowFetchForDocWrittenScriptsInMainFrame=true,cssExternalScannerNoPreload=false,cssExternalScannerPreload=true
--enable-pinch
--num-raster-threads=1
--content-image-texture-target=0,0,3553;0,1,3553;0,2,3553;0,3,3553;0,4,3553;0,5,3553;0,6,3553;0,7,36197;0,8,3553;0,9,36197;0,10,36197;0,11,36197;0,12,36197;0,13,3553;0,14,36197;0,15,3553;0,16,3553;1,0,3553;1,1,3553;1,2,3553;1,3,3553;1,4,3553;1,5,3553;1,6,3553;1,7,3553;1,8,3553;1,9,36197;1,10,3553;1,11,36197;1,12,3553;1,13,3553;1,14,3553;1,15,3553;1,16,3553;2,0,3553;2,1,3553;2,2,3553;2,3,3553;2,4,3553;2,5,3553;2,6,3553;2,7,3553;2,8,3553;2,9,36197;2,10,36197;2,11,36197;2,12,36197;2,13,3553;2,14,3553;2,15,3553;2,16,3553;3,0,3553;3,1,3553;3,2,3553;3,3,3553;3,4,3553;3,5,3553;3,6,3553;3,7,3553;3,8,3553;3,9,3553;3,10,3553;3,11,3553;3,12,3553;3,13,3553;3,14,3553;3,15,3553;3,16,3553;4,0,3553;4,1,3553;4,2,3553;4,3,3553;4,4,35
  8. 1015: 
    /opt/google/chrome/chrome
--type=gpu-process
--field-trial-handle=1
--enable-logging
--gpu-sandbox-failures-fatal=yes
--log-level=1
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--user-data-dir=/home/chronos
--homedir=/
--use-gl=egl
--supports-dual-gpus=false
--gpu-driver-bug-workarounds=7,8,10,19,23,61,74
--disable-gl-extensions=GL_KHR_blend_equation_advanced
GL_KHR_blend_equation_advanced_coherent
--gpu-vendor-id=0x8086
--gpu-device-id=0x0f31
--gpu-driver-vendor=Mesa
--gpu-driver-version=17.1.0
--gpu-driver-date
--user-data-dir=/home/chronos
--homedir=/
--enable-logging
--log-level=1
--vmodule=*chromeos/login/*=1,auto_enrollment_controller=1,*plugin*=2,*zygote*=1,*/ui/ozone/*=1,*/ui/display/manager/chromeos/*=1,power_button_observer=2,webui_login_view=2,lock_state_controller=2,webui_screen_locker=2,screen_locker=2
--service-request-channel-token=4B437C43F914411337BBBF8467592298
  9. 1022: 
    /opt/google/chrome/chrome 
--type=gpu-broker

至于具體的每個(gè)命令行參數(shù)的意思，等后邊代碼分析完畢后補(bǔ)充。

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